基于能量检测的脉冲超宽带无数据辅助同步算法

摘要

针对无数据辅助下的脉冲超宽带同步问题,构建了一种基于能量检测算法的同步方案.首先,设计了基于两路并行能量检测结构的同步接收机,在没有训练序列辅助同步条件下实现多径信道下的同步检测.在此基础上,提出了一种能量检测接收机的噪声抑制方法,通过在判决同步点之前对积分结果进行累积处理,提高了系统性能,有效降低了噪声影响；通过推导算法的同步性能和在IEEE802.15.3a信道模型下的仿真,证明了该同步方法可以有效地降低虚警和漏检概率.%Aiming at the problem of Non-Data-Aided pulse level synchronization,a synchronization scheme based on energy detection is introduced.First,receiver sheme based on two parallel energy detection structure without the training sequence is designed for synchronization in multipath channel.In addition,a noise suppressing method is presented.The proposed noise suppressing method with the accumulation of the integration results before the synchronization point selection can improve the system performance,and decrease the influence of noise.The performance of algorithm is derived and simulated under 802.15.3a channel model which show that the algorithm can decrease the probability of false alarm and missed detection effectively.